netfilter: ebt_nflog: fix Kconfig typo

The help text should refer to nflog instead of ulog. Noticed by
Krzysztof Halasa <khc@pm.waw.pl>.
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/bridge/netfilter/Kconfig

@@ -230,7 +230,7 @@ config BRIDGE_EBT_NFLOG
 	  either the old LOG target, the old ULOG target or nfnetlink_log
 	  as backend.
 
-	  This option adds the ulog watcher, that you can use in any rule
+	  This option adds the nflog watcher, that you can use in any rule
 	  in any ebtables table.
 
 	  To compile it as a module, choose M here.  If unsure, say N.